Dynamic characteristics and fragmentation evolution of columnar rockfall: A case study of the Zengziyan rockfall in Chongqing, China

Xiangzhao KONG; Bin LI; Kai HE; Hao LUO; Wenbin CHANG; Aiguo XING

doi:10.16031/j.cnki.issn.1003-8035.202109008

Volume 33 Issue 5

Oct. 2022

Turn off MathJax

Article Contents

The Chinese Journal of Geological Hazard and Control > 2022 > 33(5): 1-10. > DOI: 10.16031/j.cnki.issn.1003-8035.202109008

KONG Xiangzhao, LI Bin, HE Kai, et al. Dynamic characteristics and fragmentation evolution of columnar rockfall: A case study of the Zengziyan rockfall in Chongqing, China[J]. The Chinese Journal of Geological Hazard and Control, 2022, 33(5): 1-10. DOI: 10.16031/j.cnki.issn.1003-8035.202109008

Citation:

PDF (18447 KB)

Dynamic characteristics and fragmentation evolution of columnar rockfall: A case study of the Zengziyan rockfall in Chongqing, China

1.
State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai　200240, China
2.
Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing　100081, China
3.
China Geological Survey, Beijing　100037, China

More Information

Received Date: September 08, 2021
Revised Date: October 26, 2021
Available Online: September 26, 2022

Graphical Abstract

Abstract

Abstract

Columnar rockfall occur widely in China and cause extreme damage to man-made structures and facilities. On 12 August 2004, Zengziyan W12 perilous rock collapsed and ran out a horizontal distance of 600 m. The rockfall caused airblast with a height of 150 m. In this paper, the dynamic characteristics and fragmentation evolution is studied based on the discrete element software MatDEM. The simulation of the rockfall process is achieved based on the discrete element model with real distribution of joints. The simulation is valid by comparing the simulation and video data. Through deeper development on MatDEM, the rock size evolution is analyzed, it was found that there were four significant breakage moments during the rockfall. The moments are rock compression breakage at the bottom of the rockfall, collision breakage of middle-upper rock mass with low-velocity triangle area, collision of middle and upper part of rock mass with ground, respectively. The fragmentation evolution of the pre- and post- rockfall is studied based on the fractal theory and dual parameters Weibull distribution. The results show that the proportion of fine particles increase obviously after the rockfall. This paper offers the basis of dynamic characteristics and fragmentation evolution of other rockfalls.
- columnar rockfall,
- Zengziyan rockfall,
- dynamic characteristics,
- fragmentation evolution,
- fractal theory,
- dual parameters Weibull distribution

FullText(HTML)

References (23)

References

[1]	CROSTA G B,IMPOSIMATO S,RODDEMAN D. Numerical modeling of 2-D granular step collapse on erodible and nonerodible surface[J]. Journal of Geophysical Research,2009,114(F3):F03020.
[2]	UTILI S,ZHAO T,HOULSBY G T. 3D DEM investigation of granular column collapse:evaluation of debris motion and its destructive power[J]. Engineering Geology,2015,186:3 − 16. DOI: 10.1016/j.enggeo.2014.08.018
[3]	ZHOU Y Y,SHI Z M,ZHANG Q Z,et al. 3D DEM investigation on the morphology and structure of landslide dams formed by dry granular flows[J]. Engineering Geology,2019,258:105151. DOI: 10.1016/j.enggeo.2019.105151
[4]	HUANG B L,WANG J,ZHANG Q,et al. Energy conversion and deposition behaviour in gravitational collapse of granular columns[J]. Journal of Mountain Science,2020,17(1):216 − 229. DOI: 10.1007/s11629-019-5602-9
[5]	陈智强,李渝生. 重庆市南川甑子岩危岩形成演化机制分析及防治措施探讨[J]. 中国地质灾害与防治学报,2004,15(1):78 − 81. [CHEN Zhiqiang,LI Yusheng. Analysis on formation and development mechanism and discussion on prevention measures for Zenziyan dangerous rock mass in Chongqing[J]. The Chinese Journal of Geological Hazard and Control,2004,15(1):78 − 81. (in Chinese with English abstract) DOI: 10.3969/j.issn.1003-8035.2004.01.017
[6]	贺凯. 塔柱状岩体崩塌机理研究[D]. 西安: 长安大学, 2015 HE Kai. Research on collapse mechanism of tower rock[D]. Xi’an: Changan University, 2015. （in Chinese with English abstract）
[7]	贺凯,殷跃平,李滨,等. 塔柱状岩体崩塌运动特征分析[J]. 工程地质学报,2015,23(1):86 − 92. [HE Kai,YIN Yueping,LI Bin,et al. Video imaged based analysis of motion characteristic for tower rock collapse[J]. Journal of Engineering Geology,2015,23(1):86 − 92. (in Chinese with English abstract) DOI: 10.13544/j.cnki.jeg.2015.01.013
[8]	贺凯,殷跃平,冯振,等. 重庆南川甑子岩-二垭岩危岩带特征及其稳定性分析[J]. 中国地质灾害与防治学报,2015,26(1):16 − 22. [HE Kai,YIN Yueping,FENG Zhen,et al. Analysis of characteristics and stability for Zengziyan-Eryayan unstable rocks belt in Nanchuan County Chongqing[J]. The Chinese Journal of Geological Hazard and Control,2015,26(1):16 − 22. (in Chinese with English abstract) DOI: 10.16031/j.cnki.issn.1003-8035.2015.01.003
[9]	冯振,陈云霞,李滨,等. 重庆南川甑子岩山体崩塌机制研究[J]. 水文地质工程地质,2016,43(1):50 − 56. [FENG Zhen,CHEN Yunxia,LI Bin,et al. Failure mechanism on the Zengziyan collapse in Nanchuan of Chongqing[J]. Hydrogeology & Engineering Geology,2016,43(1):50 − 56. (in Chinese with English abstract) DOI: 10.16030/j.cnki.issn.1000-3665.2016.01.08
[10]	孙敬辉,石豫川. 重庆甑子岩崩塌落石动力学特征及危险性分区[J]. 中国地质灾害与防治学报,2019,30(3):6 − 11. [SUN Jinghui,SHI Yuchuan. Dynamics and hazard zoning of collapse and rockfall in Zengziyan,Chongqing[J]. The Chinese Journal of Geological Hazard and Control,2019,30(3):6 − 11. (in Chinese with English abstract) DOI: 10.16031/j.cnki.issn.1003-8035.2019.03.02
[11]	任幼蓉,陈鹏,张军,等. 重庆南川市甑子岩W12^#危岩崩塌预警分析[J]. 中国地质灾害与防治学报,2005,16(2):28 − 31. [REN Yourong,CHEN Peng,ZHANG Jun,et al. Early-warning analysis on the rockfall for Zenziyan W12^# dangerous rock mass in Nanchuan City of Chongqing[J]. The Chinese Journal of Geological Hazard and Control,2005,16(2):28 − 31. (in Chinese with English abstract) DOI: 10.3969/j.issn.1003-8035.2005.02.006
[12]	刘春,范宣梅,朱晨光,等. 三维大规模滑坡离散元建模与模拟研究—以茂县新磨村滑坡为例[J]. 工程地质学报,2019,27(6):1362 − 1370. [LIU Chun,FAN Xuanmei,ZHU Chenguang,et al. Discrete element modeling and simulation of 3-dimensional large-scale landslide-taking xinmocun landslide as an example[J]. Journal of Engineering Geology,2019,27(6):1362 − 1370. (in Chinese with English abstract) DOI: 10.13544/j.cnki.jeg.2018-234
[13]	奚悦. 基于离散单元法的岩石颗粒破碎研究[D]. 上海: 上海交通大学, 2016 XI Yue. Study on the rock particle crushing using discrete element method[D]. Shanghai: Shanghai Jiao Tong University, 2016. （in Chinese with English abstract）
[14]	HOU T X,XU Q,ZHOU J W. Size distribution,morphology and fractal characteristics of brittle rock fragmentations by the impact loading effect[J]. Acta Mechanica,2015,226(11):3623 − 3637. DOI: 10.1007/s00707-015-1409-0
[15]	TURCOTTE D L. Fractals and fragmentation[J]. Journal of Geophysical Research,1986,91(B2):1921. DOI: 10.1029/JB091iB02p01921
[16]	王健,黄波林,张全,等. 碎裂化柱状危岩体崩塌-堆积特征概化模型研究[J]. 水利水电技术,2020,51(2):136 − 143. [WANG Jian,HUANG Bolin,ZHANG Quan,et al. Study on generalized model of collapse-deposit characteristics of cataclastic and columnar dangerous rock mass[J]. Water Resources and Hydropower Engineering,2020,51(2):136 − 143. (in Chinese with English abstract) DOI: 10.13928/j.cnki.wrahe.2020.02.016
[17]	LUBE G, HUPPERT H E, SPARKS R S J, et al. Collapses of two-dimensional granular columns[J]. Physical Review E, Statistical, Nonlinear, and Soft Matter Physics, 2005, 72（4 Pt 1）: 041301.
[18]	郝明辉,许强,杨兴国,等. 高速滑坡-碎屑流颗粒反序试验及其成因机制探讨[J]. 岩石力学与工程学报,2015,34(3):472 − 479. [HAO Minghui,XU Qiang,YANG Xingguo,et al. Physical modeling tests on inverse grading of particles in high speed landslide debris[J]. Chinese Journal of Rock Mechanics and Engineering,2015,34(3):472 − 479. (in Chinese with English abstract)
[19]	KERMANI E,QIU T,LI T B. Simulation of collapse of granular columns using the discrete element method[J]. International Journal of Geomechanics,2015,15(6):4015004. DOI: 10.1061/(ASCE)GM.1943-5622.0000467
[20]	陈小婷,黄波林. FEM/DEM法在典型柱状危岩体破坏过程数值分析中的应用[J]. 水文地质工程地质,2018,45(4):137 − 141. [CHEN Xiaoting,HUANG Bolin. Application of the FEM/DEM method to numerical analyses of the failure process of representative pillar-shape dangerous rockmass[J]. Hydrogeology & Engineering Geology,2018,45(4):137 − 141. (in Chinese with English abstract) DOI: 10.16030/j.cnki.issn.1000-3665.2018.04.20
[21]	纳曼·麦麦提,米红林. 基于离散元的危岩群体崩塌影响因素分析[J]. 人民长江,2021,52(2):99 − 104. [NAMAN·Maimaiti,MI Honglin. Numerical simulation on collapsing influence factors of perilous rock groups based on discrete element method[J]. Yangtze River,2021,52(2):99 − 104. (in Chinese with English abstract) DOI: 10.16232/j.cnki.1001-4179.2021.02.016
[22]	张家勇,邹银先,杨大山. 基于PFC^3D的鱼鳅坡滑坡运动过程分析[J]. 中国地质灾害与防治学报,2021,32(4):33 − 39. [ZHANG Jiayong,ZOU Yinxian,YANG Dashan. Analysis of Yuqiupo landslide motion process based on PFC^3D[J]. The Chinese Journal of Geological Hazard and Control,2021,32(4):33 − 39. (in Chinese with English abstract)
[23]	陶志刚,张海江,尹利洁,等. 基于FDEM的戒台寺古滑体开裂破坏过程数值模拟[J]. 水文地质工程地质,2017,44(3):105 − 112. [TAO Zhigang,ZHANG Haijiang,YIN Lijie,et al. Numerical modeling of cracking for the Jietai temple ancient landslide with the combined finite-discrete element method[J]. Hydrogeology & Engineering Geology,2017,44(3):105 − 112. (in Chinese with English abstract) DOI: 10.16030/j.cnki.issn.1000-3665.2017.03.16

Cited By

Figures(11) / Tables(1)

Get Citation

PDF

XML

Article views PDF downloads

Dynamic characteristics and fragmentation evolution of columnar rockfall: A case study of the Zengziyan rockfall in Chongqing, China

Abstract

References

Catalog

Export File

Citation

Format

Content